Tube bundle heat exchanger

Abstract

Tube bundle heat exchanger of graphite, in which a multiplicity of graphite tubes are set into the tube sheets and are joined to the sheets by screw or cement joints, characterized by the feature that each tube is surrounded by at least one group of graphite fiber bundles, the latter are connected to the tube in a force-locking manner, and the distance of adjacent fiber bundles is five to ten times the diameter of the graphite fiber bundle.

I claim: 
     
       1. Tube bundle heat exchanger of graphite, comprising a multiplicity of graphite tubes set into tube sheets and joined to the sheets by screw or cement joints, with each tube surrounded by at least one group of graphite fiber bundles, which are connected to the tube in a force-locking manner and with adjacent fiber bundles of the group spaced a distance five to ten times the diameter of the graphite fiber bundle, wherein the fiber bundles are prestressed. 
     
     
       2. Tube bundle heat exchanger according to claim 1, wherein the force-locking connection between the fiber bundles and the tube consists of acrylic resin bridges.